<?php
/**
 * Zend Framework
 *
 * LICENSE
 *
 * This source file is subject to the new BSD license that is bundled
 * with this package in the file LICENSE.txt.
 * It is also available through the world-wide-web at this URL:
 * http://framework.zend.com/license/new-bsd
 * If you did not receive a copy of the license and are unable to
 * obtain it through the world-wide-web, please send an email
 * to license@zend.com so we can send you a copy immediately.
 *
 * @category   Zend
 * @package    Zend_Pdf
 * @copyright  Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
 * @license    http://framework.zend.com/license/new-bsd     New BSD License
 * @version    $Id: Null.php 16541 2009-07-07 06:59:03Z bkarwin $
 */


/** Zend_Pdf_Element */
require_once 'Zend/Pdf/Element.php';


/**
 * PDF file 'null' element implementation
 *
 * @category   Zend
 * @package    Zend_Pdf
 * @copyright  Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
 * @license    http://framework.zend.com/license/new-bsd     New BSD License
 */
class Zend_Pdf_Element_Null extends Zend_Pdf_Element
{
	/**
	 * Object value. Always null.
	 *
	 * @var mixed
	 */
	public $value;


	/**
	 * Object constructor
	 */
	public function __construct()
	{
		$this->value = null;
	}


	/**
	 * Return type of the element.
	 *
	 * @return integer
	 */
	public function getType()
	{
		return Zend_Pdf_Element::TYPE_NULL;
	}


	/**
	 * Return object as string
	 *
	 * @param Zend_Pdf_Factory $factory
	 * @return string
	 */
	public function toString($factory = null)
	{
		return 'null';
	}
}
